Abstract: A prosthetic knee joint including stance-phase control means comprising lock or latch for holding the knee in a straight condition, and means determining the status of the latch, said status determining means defining a control axis located so that the lock or latch is activated when a load imposed on the joint passes through a line posterior to said axis, and is de-activated when the load passes through a line anterior to said axis.

Abstract: A remote-controlled rear-view mirror assembly is movably supported in a housing and can be adjusted by an electric motor from a remote point. An electric motor is mounted in the mirror housing and has an electrically reversibly direction of rotation and stepdown gearing. The drive shaft is connected to a crank. A pin connected to the crank executes circular motion about the centerline axis of the drive shaft when the motor is activated. The pin slides in an endless groove cut in the face of a spherically shaped cam. The spherically shaped cam and mirror are rigidly attached at opposite ends of a common shaft. The common shaft has a spherical ball located at a point between the two ends. The spherical ball moves within a spherical cup which is attached to the mirror housing. The movement of the pin in the groove causes the mirror to pivot about the center of the spherical ball joint, giving the mirror its necessary range of motion.

Abstract: A material cutting machine includes a pair of cylindrical rollers through which a web of sheet material is passed, one roller being driven while the other is allowed to track with the sheet material so that it accurately measures the length of the material passing through the rollers. Means are included for stopping the drive roller after a prescribed length of material has been measured by the measuring roller. After such stopping, a cut-off apparatus is made to reciprocate across the web to cut off a predetermined length of material.